Or you could just be ridiculous, like me, and have both: TB Evo6 and a TB Evo6 with the Exo6 conversion.
And I agree with nubs, I have read through this thread and didn't really get the vibe that the "stock" Evo6 isn't good - the Exo6 conversion, however, does make it better. And I'm a Tamiya nut (have 11 Tamiya chassis' at the moment) but can see where the Exotek products do make an improvement on a solid design.
I say kudos to MikeR and Exotek for
improving a great chassis and not just coming out with a bunch of
pretty upgrades.